From a69905c8a327dca79dfb821bc5e0e8b18d0a187d Mon Sep 17 00:00:00 2001
From: skarg <skarg@1e814d3a-8a88-4260-be86-c0dc25669c1e>
Date: Wed, 23 Mar 2005 16:03:34 +0000
Subject: [PATCH] returning early if no data was received

---
 bacnet-stack/ports/linux/ethernet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bacnet-stack/ports/linux/ethernet.c b/bacnet-stack/ports/linux/ethernet.c
index 07857309..841278a9 100644
--- a/bacnet-stack/ports/linux/ethernet.c
+++ b/bacnet-stack/ports/linux/ethernet.c
@@ -318,6 +318,9 @@ uint16_t ethernet_receive(
         return 0;
     }
 
+    if (received_bytes == 0)
+      return 0;
+    
     /* the signature of an 802.2 BACnet packet */
     if ((buf[14] != 0x82) && (buf[15] != 0x82)) {
         //fprintf(stderr,"ethernet: Non-BACnet packet\n");